When changing your preset in GUITAR RIG 2, the sound of the layers recorded before changes as well. This happens because the Loop Machine is rather at the beginning or the middle of the signal chain. If you want to record layers with different sounds which do not change once you choose the next preset, you need to put the Loop Machineat the end of the signal chain. Since the signal goes from the top of the Rack to the bottom, you need to put it directly in front of the OUTPUT Module.